Lantana species is regarded both a notorious weed and a popular ornamental garden plant. Allelopathy involves both inhibitory and stimulatory biochemical interactions between plants. Lantana allelopathic effect studies have been done on several crops such as Musturds, (Brassica juncea,) Coriander (Coriandrum sativum) Baby corn (Zea mays), F₁ hybrid beet (Beta vulgaris), Japanese white radish (Raphanus sativus), Fenugreek (Trigonella foenum graecum) and Kasturi- methiunder both laboratory and field conditions to determine their allelopathic potential and its use. We observed that allelochemicals present in various solvents extracts of a leaf and flower such as alkaloid, flavonoids, terpenoids, triterpenoids of Lantana inhibited the germination, growth, and metabolism of several crops and vegetables such as Musturds, (Brassica juncea,) Coriander (Coriandrum sativum) Baby corn (Zea mays), F₁ hybrid beet (Beta vulgaris), Japanese white radish (Raphanus sativus), Fenugreek (Trigonella foenum graecum) and Kasturi- methi.